My brother bullied me because he was five years older than me. How should I scold him?

Personally, I think it is completely unnecessary. After all, brothers, blood is thicker than water. Maybe he just thinks he is older than you, so he will restrain you. Not a bully as you understand it. You can communicate with him more and tell him that his behavior makes you feel particularly uncomfortable, so that he can pay more attention to his words and deeds in the future.